I dont believe this is possible due to the designed on the BlackBerry. Just past the clipboard into an email and send it to yourself.

Theoretically, this could be streamlined by writing a PC desktop application that somehow adds a "Send to BlackBerry Clipboard" feature. Then a BlackBerry application will automatically copy a specially-marked incoming email message to the clipboard. Some developer will have to take upon this challenge, if there's enough of a market demand for this...